Particulate dust concentrations and Coarse Particle Percentage from EPICA ice core EDML ...

• Main Authors: Fischer, Hubertus, Wegner, Anna, Delmonte, Barbara, Petit, Jean Robert, Erhardt, Tobias, Ruth, Urs, Svensson, Anders M, Vinther, Bo Møllesøe, Miller, Heinrich
• Format: Dataset
• Language: English
• Published: PANGAEA 2023
• Subjects: coarse particle percentage; Mineral dust; particle mass concentration; particle number concentration; Depth, ice/snow, top/minimum; DEPTH, ice/snow; Depth, ice/snow, bottom/maximum; Particle concentration; Coarse particle fraction; Age, minimum/young; AGE; Age, maximum/old; EPICA drill; Antarctic ice core chronology AICC2012; EPICA-Campaigns; Kohnen Station; European Project for Ice Coring in Antarctica EPICA; Antarc*; Antarctic; Antarctica; DML; Dronning Maud Land; EPICA; ice core
• Online Access: https://dx.doi.org/10.1594/pangaea.955821; https://doi.pangaea.de/10.1594/PANGAEA.955821

We present a record of particulate dust concentration and size distribution in subannual resolution measured on the European Project for Ice Coring in Antarctica (EPICA) Dronning Maud Land (EDML) ice core drilled in the Atlantic sector of the East Antarctic plateau. The record reaches from present day back to the penultimate glacial until 145,000 years B.P. with subannual resolution from 60,000 years B.P. to the present. Mean dust concentrations are a factor of 46 higher during the glacial (~850–4600 ng/mL) compared to the Holocene (~16–112 ng/mL) with slightly smaller dust particles during the glacial compared to the Holocene and with an absolute minimum in the dust size at 16,000 years B.P. The changes in dust concentration are mainly attributed to changes in source conditions in southern South America. An increase in the modal value of the dust size suggests that at 16,000 years B.P. a major change in atmospheric circulation apparently allowed more direct transport of dust particles to the EDML drill ... : Particle number concentration N (in particles/ml), particle mass concentration M (in ng/ml) and coarse particle fraction CPP from the EPICA DML (EDML) ice core from 451 m to 1618 m depth in 1 cm resolution (corresponding to 6371 yr before present (BP, where present is defined as 1950) to 56508 yr BP on the AICC 2012 age scale). CPP is defined as the fraction of the volume concentration of particles larger than 2 micrometers divided by the volume concentration of all particles. Data have been calculated from raw data in mm resolution. Missing values are indicated by empty values. For details regarding the measurement method please consult Wegner et al. (2015). ...